Binder for battery electrode and electrode and battery using same

摘要

The purpose of the present invention is to provide: an aqueous binder having high adhesiveness, that in particular does not exhibit oxidative degradation in an electrode environment, and having little environmental load; and an electrode and a battery that use same. Disclosed is a battery electrode binder containing: (A) a constituent unit derived from a monomer having a hydroxyl group; and (B) a constituent unit derived from a polyfunctional (meth)acrylate having no more than 5 functions. An electrode is prepared using this binder and is used in a battery such as a lithium-ion secondary battery.

主权项

1. A binder for battery electrode, comprising a polymer comprising:
(A) constitutional units derived from a monomer having a hydroxyl group, represented by the following general formula (1): wherein R1 is hydrogen, or a linear or branched alkyl group having 1 to 4 carbon atoms, R2 and R3 each is hydrogen, or a linear or branched alkyl group having 1 to 4 carbon atoms, and n is an integer of 2 to 30, and (B) constitutional units derived from a polyfunctional (meth)acrylate monomer represented by the following formula (2): wherein R11 each is, the same or different, hydrogen or a methyl group, R12 is a penta- or less valent organic group having 2 to 100 carbon atoms, and m is an integer from 2 to 5, and wherein the amount of the constitutional units (B) is from 1 to 20% by weight, based on the polymer.